You can build this backyard tire see saw. Scroll down to link for treehouse and playhouse designs
Sisterhood of the traveling brooms by jennifer.kitchen
Reuse old tires for outdoor seating
Lego characters craft! Perfect for when ever I have kids.
Make a quick and easy Lego zip line to test out slopes, angles, gravity and tension plus engineering skills. Lego zip lines are fun!
Lego Balloon Car Building Activity Lego Race Cars Kit - blow up the balloon and the car takes off
Tons of hands-on ideas for teaching place value!
50 Lego Building Projects for Kids
Free! Printable base 10 blocks, place value strips (OTH thru billions, also includes decimals)