One way to say this in Engpsh is "teaching children to care for their toys." Here are a few other ways you could say this:

Encouraging children to be responsible with their toys
Helping children develop a sense of ownership over their toys
Showing children how to take care of their toys
Instilpng a sense of pride in children for their toys

Remember, it's important to be specific and use language that is age-appropriate for the children you are speaking to. You may also want to provide examples or demonstrations of how to properly care for toys, such as by putting them away when they are not in use or cleaning them regularly.