Constructive play teaches children to be flexible thinkers and develops a sense of control and self-esteem. Techno Gears Marble Mania Mini sets are a great way to engage your children in constructive play. TGMM Whirler is a 80+ piece construction set that kids can use to build and create their own marble runs. Once completed they simply drop the marbles into the top of the track and let the fun begin! The color instruction manual provides step by step instructions for building Whirler, but you can make your own designs too! All Techno Gears sets are interchangeable and the mini sets will require a minimum of 1-2 hours of construction for completion. This product aligns with the Science, Technology, Engineering and Math standards. Ages 6+ years.