I put one in the card I sent my niece for her birthday. She LOVED IT! Not only did she love it, her 2 brothers did also! The three of them played with it for over an hour! They took turns winding it up & letting it go. Just that one butterfly was the hit of her party! Since then I have put them in cards & packages, & the result is the same. Everyone loves them, adults also, & they start playing with them over & over. Not only are they the gift that keeps on giving, but one friend passed ...