Making suggestions

Arnau- It's Alex birthday next week. Let's buy her a present!
Roca-OK. Shall we give her a computer game?
Arnau-I'm not sure. She doesn't really like playing a computer.
Roca-Well, why don't we get her a mobile phone?
Arnau-Great idea. She probably needs a mobile phone.
Roca-OK. Let's buy her the mobile phone now.