Here's the list of awesome 1 balloon 'blanks' I like to throw at them. You just can't say no when someone offers you:
Love Birds on a Heart
A Ray Gun/ A Hairdryer
A "Why Not?" (Y Knot) (uses pop technique)
Other Awesome 1 balloon Sculptures:
A Mouse on a Unicycle
A Bicycle (uses pop technique)
Most of these you can figure out yourself but if your interested in instructions, just msg me and I'll try to locate the link of where I found these or similar. (Some were learned in books) Or I will explain it for you. They're not hard, the goal is 1 balloon sculptures that you can do during line work with little fuss at a good speed.