Would a male kitten be okay with my two 1 1/2 yr old female cats?

With both cats sniffing the other's scent on those cloth items you've offered, they'll be familiar with each other even before they meet face-to-face. Let the resident cat see the new one through the partially opened door of his safe room, and once you've repeated this for a few days or a week, allow them to meet, with your supervision, in a neutral room. They'll sniff at each other, and may posture with tails up or just stare. Offer a toy they can share to encourage them to play. If one or both cats seem stressed, keep the encounter short, and then repeat for a longer period later. Gradually, they will accept each other.