Little Lady managed to get on with hers herself, whereas the boys needed some help, so I got them to think of some wording, traced out letters and shapes that they liked and let them fill them in with details and colour them in.
As usual, they got really cited threw themselves into the task, then realised it took patience and work and got bored and started wandering off at the end. I had to encourage them to finish the design so I could iron it on.
The pens were fairly easy to use, although it was slow progress as you have to go over the colour more than once sometimes to get the intensity of colour you want. I quite like how these turned out and might customise some for the baby. Now we just have to wait for summer to wear them insh'Allah.