The caps might get too bulky

  • We will first use the AAA battery but later on we might try using two button batteries

The caps won't be waterproof

  • We might add a shield to the LED. Lilypad is already washable.

IR transceiver might not work as we expected

  • This need to be further discussed

User find it hard to change the text or image

  • Try to design a more user-friendly interface