Ladybug Mazes
Click on Ladybug Mazes
Program the ladybug to get through the maze to reach the blue dot.
If you like ladybug mazes, here is a similar challenge to try:
Turtle Pond

Build and solve puzzles

Fantastic Contraption
Build a contraption that "solves" the challenge.

Simple Machines Game
Build Your Own Space Mission
NASA Kids Club
Lego Digital Designer (this is free software that you can download to your computer)

Challenge your brain with Sudoku puzzles!
1. Click on "options" and choose 4x4. For tiles, choose whichever you prefer.
2. Turn the timer off, at least until you get good at this.