Adding & Taking Away
Notice what joins in and what goes away.
24 pages you can open and draw on right here.
Bivo: Magic Changes · Bivo · Set A: Find the biggest · Age 2.5-3
Compare the three boxed moons. Which takes up the most space?
Bivo: Magic Changes · Bivo · Set B: Find more · Age 2.5-3
Pair a potion in one box with a potion in the other. Is any potion left without a partner?
Bivo: Magic Changes · Bivo · Set A: Make it smaller · Age 4
Compare each choice with the starting moon. Which one has shrunk?
Bivo: Magic Changes · Bivo · Set B: One more potion · Age 4
Count the starting group, then show one extra finger. Find the group that matches.
Bivo: Magic Changes · Bivo · Set A: Same moon, new size · Age 5
Check two things: is it still the same kind of object, and has its size changed?
Bivo: Magic Changes · Bivo · Set B: One potion disappears · Age 5
Cover one starting potion with your finger. Which box matches what remains?
Bivo: Magic Changes · Bivo · Set A: Work the magic backward · Age 6-7
For the second question, undo the change. What must the moon have looked like before the shrinking?
Bivo: Magic Changes · Bivo · Set B: Magic both ways · Age 6-7
Use Answer to choose or build your answer on the page. Use Pen to draw and color. You can erase, undo, and try again.
Dako: Beach Parade · Dako · Little ducklings · Age 2.5–3
Touch each little duckling once. Who is leading the group?
Dako: Beach Parade · Dako · A longer parade · Age 4
Keep track of which ducklings you have already touched.
Dako: Beach Parade · Dako · One is hiding · Age 5
Can you find a duckling even when you cannot see its whole body?
Dako: Beach Parade · Dako · One more joins · Age 6–7
Follow the arrow to find who is moving into the waiting group.
Kuvi: Balance Builder · Kuvi · Find the same shell · Age 2.5–3
Compare the outlines of the shells.
Kuvi: Balance Builder · Kuvi · Add the dots · Age 4
The dots tell you weight. Add all the dots within each choice.
Kuvi: Balance Builder · Kuvi · Look at both pans · Age 5
Remember the shell already on the right. How much is still missing?
Kuvi: Balance Builder · Kuvi · Solve both changes · Age 6–7
After each change, compare the total weight on both pans again.
Pevo: Shell Sums · Pevo · Count and circle · Age 4
Follow a simple order so that no shell is counted twice.
Pevo: Shell Sums · Pevo · Find, count, and color · Age 5
Find the spiral shells before you count.
Pevo: Shell Sums · Pevo · One scene, two questions · Age 6–7
Start with the shells already there and count on to the number Pevo wants.
Rilo: Forest Circles · Rilo · Empty hideouts · Point · Age 2.5–3
Look inside both hideouts. What do you notice?
Rilo: Forest Circles · Rilo · Empty hideouts · Draw · Age 4
Use Answer to choose or build your answer on the page. Use Pen to draw and color. You can erase, undo, and try again.
Rilo: Forest Circles · Rilo · Empty hideouts · Match · Age 5
Use Answer to choose or build your answer on the page. Use Pen to draw and color. You can erase, undo, and try again.
Rilo: Forest Circles · Rilo · Empty hideouts · One comes in, one goes out · Age 6–7
For each picture, begin with what is inside its hideout, then follow the change.