Write a personal note on the mini message card and send it along with the wood board using the envelope included in the package. The recipient can simply pop out the letters and in a few minutes assemble them together without glue or tape to build a messenger robot that can even hold your note! Available in three colors (pink / orange / green) of Happy Birthday, Congratulations and Thank You. Also available as souvenirs from cities - San Francisco featuring Golden Gate Bridge and New York City featuring the Statue of Liberty. Assembled size (estimate) : 1.2" x 1.2" x 2"