This is a case of 16 Creation Kits
Build up to 10 projects per kit out of 25 to choose from. 1 hot glue gun and 1 roll of masking tape per kit included!
High-res video instructions - It's the 21st century, so all project plans are shown in snappy videos on STEM-Inventions.com, or view step-by-step picture instructions on digital slideshows.
Tried and kid-tested - The STEM Inventions collection of 25 projects was developed, taught, and fine-tuned with real kids over several years by project-based educators 
Invent, test, and redesign - Strengthen creative problem solving and troubleshooting skills while testing and customizing your creations 
Real STEM concepts - Each video explains the main science and engineering principles that are behind the project