Customers say these monthly subscription boxes are incredibly engaging and educational for children aged 6-14. Kids eagerly await each delivery and immediately start building the engineering projects, which typically take 30 minutes to an hour to complete. Many reviews mention the builds help develop problem-solving skills, creativity, and understanding of physics concepts. Parents appreciate how the boxes encourage hands-on learning and provide quality bonding time. The accompanying videos are well-made and easy to follow. Customer service receives praise for quick responses and free replacement parts when needed. Children often play with their completed creations for weeks afterward.