In the past few months, we have covered plenty of balance boards to add instability to your workouts. The FITGENX 5 In 1 Wobble Balance Board is also worth a look. It can tone your legs, core, abs, and other muscles. It improves your balance and coordination and lets you use twisting motions to engage your core harder.
The balance board supports 400lbs users. It measures 26″L x 11″W x 3/4″D, so you can take it with you everywhere you go. Costs under $35 at this time.