A favorite trick and puzzler, easy enough for children but very popular with adults!

Place this tiny 1.5" bottle on the palm of your hand. At your command, the bottle tips over, and stays laying flat on your hand until you want it to pop back up. Yet, whenever the spectator tries to lay the bottle down- it pops right back up immediately!

 

You can use the imp bottle as a comedy "psychic bottle". Let the spectator ask the bottle a Yes or No question, and the bottle lays down for "Yes" and pops back up for "No". Of course, you are controlling the bottle- and the fun!