Just in! Laser Pegs - Lighted Construction Kits! Similar to Lego with a grid-lock style block, these sets include an MPS (mobile power source) that allows you to light up your multi-colored creations. Available in large or pocket-sized sets. Choose from large, themed sets; Land, Air or Sci-Fi. Small sets come in Robot, Helicopter or Aircraft. Here's some photos of their awesomeness:
P.S. If you lose the manuals you can download a new one from the Laser Pegs Website!
Have an awesome day!