We attach Charlie's to his dummy chain & then to his sleeping bag or tshirt depending what nap it is & he finds it no worries. It's the best thing we ever started doing & wish we had sooner. Some bubs will pick it up easy...others may not. But the sooner you try putting extra dummies in the cot, or attaching a chain, or taking it away (what ever works for you) the sooner they will adapt to what it is you are trying to achieve.