Let kids help think of ways to reuse household waste. Give them examples like reusing plastic containers as holders for crayons, making bird feeders from milk jugs, and reusing gift bags. Items like empty bath tissue and paper towel holders can become part of a homemade toy structure or a gerbil toy. Make picture frames for the grandparents from old CD cases or plant a garden together. Compost food waste to make a natural fertilizer for the garden and household plants. Look online or in libraries for more ideas that the kids can participate in.