Hi guys, I'd really appreciate any help, I'm useless with statistics and I'm very confused!

Basically, I have gathered data using a 5-point Likert scale, to test childrens attitudes towards peers with mental health problems. Half the childern answered questions about a boy with depression and a girl with ADHD, and the other half on a girl with depression and a boy with ADHD. So for each participant I have two sets of scores.

I'm presuming I score the attitudes by summing the answers, but I don't know how to analyse the data. I want to find out if there is a difference in attitudes depending on gender, so do attitudes differ depending on whether a girl has depression or ADHD, or whether a boy has ADHD.

Do I have to use non-parametric tests? And should I take scores for the girls (depression and ADHD) and analyse, then the scores for the boys (depression and ADHD) and analyse?