180 Days Reading, Spelling, Language, & Math Grade 5: 4-Book Set 70% polyester rich colors printed on long

180 Days Reading, Spelling, Language, & Math Grade 5: 4 Book Set 70% polyester rich colors printed on long rich colors printed on long lasting coated paperEasy to punch out designReusableCoordinates with the Blue Harmony collection Introduce kids to concepts of force and momentum with the STEM centered challenges of this fun hands on activity setKids launch balls towards goal cups with the help of a three piece adjustable pendulumScalable challenges reward kids for devising their own solutions and tweaking their approaches through trial and errorKid powered pendulum boosts hand eye coordination without the need for batteries