Africa is a LARGE continent. Where exactly will he be going to?
Watch out for bringing back wood. It is often regulated by law; your father can get into real trouble when he brings back home the wrong (protected) species. In any case, make sure there is no bark left on the wood. I sneaked home some ebony myself, when I was in west Africa last summer. It is difficult to find any long bow-stave like pieces of wood. Plus it's hard to sort out which species of wood it is and if it's useful. Don't expect nice lumberyards with flat boards, sorted by species...
PS: baobab wood is no good for bows; extremely soft and weak.