Giving your child choices is a great way to teach them to make decisions; however, too many choices can be overwhelming. Not only does rotating toys declutter your space, you may find your child spending more quality time with each toy.
Does it feel like you're bribing your kids when you provide the conditions "if you do xyz, then I'll give you anything you want?" Think about long term consequences for your child then you'll start to see the difference between a bribe and positive reinforcement.