Touch this bookmark and watch it change colour with the warmth of your hand. The warmth of your hand and ambient (room) temperature causes the liquid crystals encased in the bookmark to refract light differently depending on the temperature. Soothing but great fun! Overall size 40mm x 150mm. The Colour Change change can be pale or stronger in shade depending on ambient temperature. The activities appeal to the immediate sensations: warm fingers produce colour changes, rubbing hands together produces heat. See our Store for more colour changing products.
A**R
Bought as a joke for my daughter who has constantly ...
Bought as a joke for my daughter who has constantly cold hands. Works as expected which is not at all unless someone else picks it up lol!
D**E
Three Stars
alright
P**S
Great.....for a while!!
After the initial 'Thanks....but what it is daddy?' an hour or so of fun was had before it found its way into the page of her new book. It brings a few minutes of fun now every time the book is picked up but more importantly the questions of 'How does it work?' and ' What makes it change?' have more started which is what the initial intention was.
F**N
😬
Super flimsy
A**R
Five Stars
Great :)
Trustpilot
1 day ago
3 weeks ago
