If you just signed up for Boredwalk, Balloon Pop will become available 12 hours after you created your account. After 12 hours have passed, go to RECHARGE >> Balloon Pop, and pop any balloon you choose. The balloon will pop and you will receive the number of Tokens that appear.
A 12 hour timer will appear towards the top of the Balloon Pop screen, and you'll be able to pop another balloon for Tokens every 12 hours. Once the timer expires each time, head back and pop the next one! Be sure to have Push Notifications turned on so you get notified whenever your Balloon Pop is ready!
As long as you pop at least one balloon every 24 hours, you'll add to your Weekly Progress at the bottom of the screen (popping multiple balloons in one day will not complete future days in the Weekly Progress). Once you've done 6 consecutive days, on the 7th day you'll be able to pop two balloons every 12 hours instead of just one! But if you miss a day, you'll be back at Day 1, so remember to login and pop!