Loose parts trays benefit children in so many ways! 

Providing children with truly open ended materials helps them develop creativity, independence, learn to take risks, develop language and problem solving skills.

Also called Tinker Trays, these materials can be a great jumping off point for other skill development, especially in older children. Once they create something with the pieces from the tray, you can ask them to tell you about what they've made or what worked or didn't work while they were building. You could even have them draw and write about their work.

Working with loose parts encourages focus and an concentration as well. Problem solving and creative thinking are also key components of tinker tray play.