It would not be anywhere near as easy to prick your finger with these clever Bloom-Pins. Even if a bunch of them are stored within a container, gathering hands would be at little risk of drawing blood since the pointed metal ends are actually tucked away.
Soft silicone bulbs house the tiny spikes and form full enclosures around them. However, as soon as you set one to the surface of a cork board and apply pressure at the top, the thumbtack slides out of its sheath. The rubbery material flattens against the bulletin board as the pin passes into it.
To remove Hong Ying Guo's Bloom-Pin once again, you simply need to squeeze the bud at the sides and the sharp tip will pop back inside.
Retractable Rubber Tacks
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Pinocchio Thumb Tacks
Board Game Table Settings
Exhibited Implement Sets
Flying Origami Thumbtacks