A delicate situation, I imagine, as you don’t want to offend the gift givers. But you have to ask yourself if this is detrimental to your child, and it sounds like it may be. Maybe you can start by putting some of the toys away for the time being. Keep your child’s choices limited. Then ask questions and encourage him to make a decision. You can use this as an opportunity to teach decision-making–even if your child is young, have him make the choice. Explain to the gift givers what is happening and tell them you will rotate all the toy choices from time to time so nothing is wasted. Most people will understand.