To pull this off, you will need Muppet Labs Playset (open) Vanishing Cream Beaker (open) Invisible Beaker (open) A Gullible 'Victim' I chose an 8 year old I happened to have hanging around (who did not know about the variants)...... Let the victim play with the playset up until bedtime, making sure Beaker is left upside down in the pressure chamber. After he is asleep, replace the Beaker with the Vanishing Cream variant. When he discovers this he will freak out, be sure to act all concerned, and eventually suggest leaving Beaker in the pressure chamber again, right side up, to balance him out. Replace the VC Beaker with the Invisible Beaker. Upon discovery, victim will go into total melt down mode..... Eventually let him in on the gag.. and here is the most important part............ make sure you duck when he hurls the toys at your head! Thanks Palisades, the most fun we have had as a family in years! Now we can't wait to try it on someone else.