The logo will be used on a textile (e.g. damask) label that will be sewn onto the product. So it's important that the design is bold, and not too intricate. The label is an important part of the product, since it is the only place that will show the brand name. The label will be about 1" square and sewn on one corner.
This is a product for children (ages 6+) so it should be colorful. It's closely associated with Lego bricks, and their colors are typically primary red/yellow/white. See here for the Lego brand: http://aboutus.lego.com/en-us/lego-…ego_brand/