What you need:
When Cakes was 7 weeks old I made her a mobile. At the time it was more about my desire not to waste. We had received two boxes of Huggies nappies as gifts which had the cutest Winnie the Pooh pictures. On the box it explained that young babies see in black and white, so simple patterns in black in white are very appealing to young babies. After some research I learnt that this encourages babies to focus on objects, track with their eyes, encourages them to reach and helps develop their attention span. As I knew that babies like things that are shiny I added some aluminum foil. Cakes really enjoyed this mobile and played with it often (her cat did also). As it was made with items that she could choke on if she were to mouth it, this was only played with under supervision. When Cakes a little over a year old she gave it to her Little Pixie friend. So for a home made mobile it has proven to be pretty sturdy.
Do not leave baby unattended with a home made mobile like this