For brain work, Lottie loves playing "Find It".
I use training treats or small cubes of something yummy - throw one piece so she can see it and say "Find It!". Lots of praise when she does. Throw another piece further away - repeat. Hide a piece where she can't see it and repeat - help her to start with, again saying "Find it!" all the time.
Lottie got the idea very quickly - I now shut her out of the room and quickly hide bits of treat around the room and as long as I keep repeating the command, she will carry on searching till she has found them all, nose down, tail wagging madly.
