Water Cycle Craft - no instructions, but pretty easy to figure out what to do and mostly straight-cutting except for the sun which is pretty easy to make or find elsewhere. These would be fun to make for the WOW journey.
STEM Challenges for all seasons: Design a sports dome in fall, try several different snowflake challenges in winter, create a sturdy bird's nest in spring, and dive into a submersible water craft in summer. These STEM challenges engage kids of all ages. | STEM Resources by Meredith Anderson
Such simple items can be transformed into a cool activity that blends both science and art. If you have an empty water bottle, water, vegetable oil and food coloring, you can make this fascinating kid's activity! As a bonus, it also teaches kids about liquid density (and an explanation about that is included in this post!).