Kids don't need lots of toys in order for them to be happy. One of my nieces only played with a stuffed tortoise. Any new toys she'd get would be dismantled. It made me realize that kids will always have a favorite toy. If you know the toy they like you could get them a replacement [either the same toy (different color obviously) or something similar to it]. Two or three toys would be enough because kids always will find ways to amuse themselves when playing with toys bores them.