Cardboard Activities How to Shrink a Bag with Microwaves? 3 years ago Learn how to shrink a bag of chips. Explore properties of polymers, microwaves and find out what's behind this awesome… How to make and Use Cipher Wheel 4 years ago Learn how to make a simple cardboard Cipher Wheel. Encrypt and Decrypt secret messages, and learn Numbers, Letters, and Cryptography. How to make and solve the Tower of Hanoi 4 years ago Learn how to make and solve Tower of Hanoi puzzle. It's easy to make and great for algorithmic thinking, pattern… How to Make a Cardboard Projector using Smartphone and Magnifying Glass 4 years ago Learn how to make a simple homemade Projector using a Smartphone, Magnifying Glass and a cardboard box in this great… How to make a Castle from Toilet Paper Rolls 4 years ago You would probably be surprised if you count how many rolls of toilet paper you throw out every month. Have… How to Make a Toilet Roll Christmas Tree 4 years ago Decorating some sort of the evergreen tree has long been a tradition around the end of the year. We will… How to make Sensory Board 5 years ago Another sensory activity? Yes! We really can’t overstate their importance in the child’s early development. They are amazing in stimulating… Explore the Mysterious Number Pi (π) 5 years ago You have probably heard of the number Pi, that mysterious constant that goes on forever. We know it from mathematical… How to make a cardboard clock and learn to tell the Time 6 years ago Does your child know what time it is? No worries. Learning to tell the time can be an exhausting process…