I have a special noise i make that means treats to them, I use that when I want to count noses! Shaking the treat jar usually brings them running, too! Letting them out has such rewards, its 3am now and little Pip just helped me fold my laundry, and Baby wanted to help me read my book... but you also have dangers, also! One time, I accidentally closed Baby in a dresser drawer until she started crabbing to be let out, and Pip ran under my foot once which resulted in a panicked trip to the vet! Luckily he was fine...