Free spring K-5 STEM stations — hands-on science centers and engineering challenges to sample the series. This free Spring set gives you 8 nature-themed bins and 30 task cards — all print-and-go, all tied to the science happening right outside your classroom window.STEM Stations work as morning work, science centers, early finisher activities, or makerspace sessions. Students choose a bin, pull a card, gather materials, and build. The spring theme connects engineering challenges to life cycles,