Most helpful positive review
2 of 2 people found the following review helpful
Knock off, but it works
on November 5, 2012
They work on the mat, but a drop of water will form on the end of the pen. I never noticed this on the genuine pen that came with the mat. Overall I'm glad we got them, but they'll be our back ups for when our 2yr old "misplaces" the original.