You will need a whole bunch of pre blown-up water balloons (air, not water), some tape, and some no-hands noisemakers. (Kazoos?) Divide everybody into two teams, and one person from each team is selected as ‘sticky-man’. Each ‘sticky-man’ has tape (packing tape?) wrapped around them sticky side out. Each team must then choose a special sound that the sticky-man will make with their noisemaker. The Group then lines up with their share of balloons, and relay-style, blindfolds themselves, grabs a balloon, and heads toward their sound and when they find it, sticks it on their sticky-man. The sticky-men can move around, making it more difficult if they want. The first team to stick all their balloons on their sticky-man wins.
PS. You might want to consider having the ‘sticky-man’ be a boy if you have a co-ed group…you’re sticking balloons on people, blindfolded. Ahem.