TY - ART TI - Create-a-chain reaction: STEM Kit : Pre K-Grade 2 PY - 2016///] CY - Carson, CA PB - Lakeshore KW - Gravity KW - Juvenile literature KW - Motion KW - Force and energy KW - Science KW - Study and teaching (Elementary) KW - Activity programs KW - Educational games KW - lcgft N1 - "Class Set PP566"--Container; Lakeshore STEM starter set; Warning: Choking hazard--item contains small parts and small ball. Not for children under 3 yrs; 3+ ; Pre K-grade 2 N2 - Lets pre-k through second-grade students set up a course of ramps, pendulums, hammers and more ... then drop a ball onto the tracks and go for the goal box! After each test run, kids will fine-tune the placement, distance and angle of each piece--getting firsthand practice with STEM concepts such as gravity, force and momentum! Perfect for open-ended building--or kids can use the leveled challenge cards to create a variety of different courses from scratch! Set comes with 67 durable plastic pieces--including tracks, pendulums, hammers, switches, a goal box and more--plus 6 balls, 10 challenge cards and a guide. The tracks are 12" long ER -