Review on B Toys Light-Up Bouncy Ball Kit by Kyle Pickett

Bought for our two girls. Age 5.5 and 3 years. they loved her. Beautiful colors, durable design. Glowing balls inside are so much fun! They laugh and smile while hopping on them. They even ask if they can "treat before bed" by riding them around the house. However, they were not allowed outside. Thought it would be a toy for the house. I don't want anything to accidentally pop or get dirt/rocks inside. So I don't know how fair they are to the outside world.