LED Laser Pointer light pen is going to give your pet some fun time exploring. This seventy-eight by thirteen millimeter pen is the best playtime accessory when you want to keep your animal controlled yet entertained. Pen light available in different colors such as silver,blue,red,yellow, and pink. Each color also houses a different laser animation as well. Collect each one and your pet will never be bored. Best part as well is that batteries are included with each pen's purchase.