Yes I think that it's a real problem because usually these children work much for very low wages. Plus they are constantly in the presence of hazardous materials. Those children don't know what they are doing, they think that this is something normal but it's not!
I think that we could help the disadvantaged families in Tunisia for that they don't send theirs childen work, but it's a little utopian. The best solution I think could be that Tunisian' government forbid child labour.