Not for weak hands ...

The magnets make a good impression and accomplish your task almost more than one would like. The magnetization is so extremely strong that I'm having trouble with your fingers to release the hearts again from the magnetic board. They adhere super strong, you really need a pair of pliers to loosen it. It sticks to the magnet something (heavy) to a wall which is to stay longer there's all OK. If you want to remove them frequently and often change the location (eg in presentations) they are unwatchable.