 
Once upon a time there was a little girl called Lola. She was three. Lola had a key and she wanted to measure it. She took it to her mum and said, "Mum can you help me measure my key?"
Mum smiled and got out a ruler. She measured the key, then said, "It's 8 cm long! Now, why do you need to measure it?"
Lola replied, "Because I was feeling uncomfortable and I needed to see how big the key was."
Mum smiled and said, "That's a good reason! Maybe having the key measured will make you feel better."
Lola smiled and said, "It did! Thanks for helping me, Mum. Now I feel much better."
