Perform the following tasks in order to unlock new contents.

Code - Effect

Hard mode for Calculations x 100 game - Get 11 stamps or score below 90 seconds
Hard mode for Head Count game - Get 09 stamps
Hard mode for Triangle Math game - Get 17 stamps
Head Count game - Get 03 stamps
Low to High game - Get 01 stamp
Stamp Designer Option - Get 07 stamps
Syllable Count game - Get 02 stamps
Time Lapse game - Get 15 stamps
Tips Option - Get 05 stamps
Triangle Math game - Get 13 stamps
Voice Calculation game - Get 20 stamps