Wrap-ups to learn to count ADDITION (Smart String)

The popular aid for the smallest pupils to learn to count. It helps practice addition.The model has been printed, print settings verified. The print was then tested by kids and found by them to be fun!Update note March-2024: The print profile was updated to improve printability and get cleaner texts on the front-side. Learn by self-evaluationIt's fun when kids can learn on their own without the boring teacher correcting them all the time.With the wrap-ups, the children evaluate themselves and can keep trying and training the task again and again on their own with no hassle.How to assembly:Easy. Print the one plate with all pieces. Stack the key-shaped pieces on the rivet. Thread a string through the hole in the rivet. Let the long end of the string hang from the back side. Secure the rivet by stuffing a larger knot or small bead into its head. You are ready to go.How to use (for the kids):You start winding from the starting notch.Lead the string from the notch on the left to the co