With blocks at the ready, watch as your baby uses their hands to bear weight and the couch for support while experimenting with setting up a sturdy base, stacking a tower, spanning a space with an arch--and applying force, of course. Bash! Smash! Crash! Babies and toddlers are naturally curious explorers--now help them discover that science is fun! In this bright, graphic board book, photos of busy little ones offset a lively running dialogue sprinkled with factual asides that define basic engineering terms.