Hey bmum - its fantastic when they first start. I found that once he got the first few signs he was picking them up super quick so we just started to do everything at once. Useful ones to add are drink/thirsty, eat, sleep, poo, nappy, book...you can also add musical instruments, animals, hear, different fruits (banana, apple, pear etc) Really, sky is the limit. DS has over 60 signs and has started to speak, he has also started to recognise letters and sound out simple words - I am not sure if this is early or standard but I think the signing has really helped develop his language skills and helped us avoid so many potential tantrums