An aqueous adhesive for rubber includes rubber latex and an ammonium-salt-based vulcanization acceleration aid. An amount of the ammonium-salt-based vulcanization acceleration aid contained in the aqueous adhesive is preferably not less than 0.01% by weight and not greater than 5.0% by weight in terms of solid content. An aqueous adhesive for a ball includes rubber latex as a main component. A content of an inorganic filler in the aqueous adhesive is not greater than 0.1% by weight in terms of solid content. A ball 2 includes a hollow core 4 obtained by crosslinking a rubber composition that contains a vulcanizing agent. The core 4 is formed of two hemispherical half cores. The two half cores are adhered to each other by using the aqueous adhesive for a ball.

An aqueous adhesive for rubber includes rubber latex and an ammonium-salt-based vulcanization acceleration aid. An amount of the ammonium-salt-based vulcanization acceleration aid contained in the aqueous adhesive is preferably not less than 0.01% by weight and not greater than 5.0% by weight in terms of solid content. An aqueous adhesive for a ball includes rubber latex as a main component. A content of an inorganic filler in the aqueous adhesive is not greater than 0.1% by weight in terms of solid content. A ball 2 includes a hollow core 4 obtained by crosslinking a rubber composition that contains a vulcanizing agent. The core 4 is formed of two hemispherical half cores. The two half cores are adhered to each other by using the aqueous adhesive for a ball.

A toy water ball includes a plurality of petals each having a first edge portion and a second edge portion. Each first edge portion is provided with first magnetic members, and each second edge portion is provided with second magnetic members. When all petals are closed to form a spherical shape, an attraction force is generated between the first magnetic members of each petal and the second magnetic members of the adjacent petal so that the first edge portion of the petal tightly fit the second edge portion of the adjacent petal and a water-carrying cavity is formed. The toy water ball can be closed or opened repeatedly and can be reused. Thus, it is environmentally friendly and clean. Furthermore, the toy water ball can be filled with water in a common water source without a specific pressure, so it can be used in many occasions, and has strong applicability.

A toy water ball includes a plurality of petals each having a first edge portion and a second edge portion. Each first edge portion is provided with first magnetic members, and each second edge portion is provided with second magnetic members. When all petals are closed to form a spherical shape, an attraction force is generated between the first magnetic members of each petal and the second magnetic members of the adjacent petal so that the first edge portion of the petal tightly fit the second edge portion of the adjacent petal and a water-carrying cavity is formed. The toy water ball can be closed or opened repeatedly and can be reused. Thus, it is environmentally friendly and clean. Furthermore, the toy water ball can be filled with water in a common water source without a specific pressure, so it can be used in many occasions, and has strong applicability.

A throwable exploding water ball includes a main body and a sealing cover member. The main body is provided with at least one opening, and the opening is in communication with an inner cavity of the main body. The main body and the sealing cover member are both made of an elastic soft material. The sealing cover member is connected to the main body through a connecting member and seals the opening, so that the inner cavity of the main body is able to store water. When the main body and/or the sealing cover member are deformed by an impact, an openable and closeable opening is formed between the main body and the sealing cover member, so that the water in the inner cavity of the main body is splashed out from the openable and closeable opening through the opening.

A throwable exploding water ball includes a main body and a sealing cover member. The main body is provided with at least one opening, and the opening is in communication with an inner cavity of the main body. The main body and the sealing cover member are both made of an elastic soft material. The sealing cover member is connected to the main body through a connecting member and seals the opening, so that the inner cavity of the main body is able to store water. When the main body and/or the sealing cover member are deformed by an impact, an openable and closeable opening is formed between the main body and the sealing cover member, so that the water in the inner cavity of the main body is splashed out from the openable and closeable opening through the opening.

Disclosed is a baseball with a luminous function, including a baseball body, an adjusting assembly, a luminous body assembly, and a battery. Latches are arranged on an inner side wall of an upper ball body; a bump is arranged between the latches; latch holes are formed in the inner wall of the ball body; a groove is formed between the latch holes; after the upper ball body and a lower ball body are closed, the latches are connected to the latch holes in an inserted manner and are fixed, so that the upper ball body and the lower ball body are fixed together, and the latches and the latch holes are fixed or separated, so that the upper ball body and the lower ball body are closed or opened; the adjusting assembly is arranged at a top of the baseball body; and an adjusting button adjust a luminous body.

Disclosed is a baseball with a luminous function, including a baseball body, an adjusting assembly, a luminous body assembly, and a battery. Latches are arranged on an inner side wall of an upper ball body; a bump is arranged between the latches; latch holes are formed in the inner wall of the ball body; a groove is formed between the latch holes; after the upper ball body and a lower ball body are closed, the latches are connected to the latch holes in an inserted manner and are fixed, so that the upper ball body and the lower ball body are fixed together, and the latches and the latch holes are fixed or separated, so that the upper ball body and the lower ball body are closed or opened; the adjusting assembly is arranged at a top of the baseball body; and an adjusting button adjust a luminous body.