Building dams is an excellent hands-on STEM activity for children that makes use of a favourite building material, LEGO! This is an at-home version of a popular museum activity for children.
Kids will be able to build dams and explore the water flow!

What you need:
LEGO base Plate
LEGO 2×2 and 2×4 Bricks
LEGO Slopes {assorted sizes}
LEGO Hinged Pieces {2}
Tray or Shallow Bin {to catch water}
Bottle of Water {to test your design}