Cross-Polinated Squash

I am growing three yellow straight-neck squash plants, along with one zucchini. I am not keeping the seeds from these plants, so when I see any male and female flowers, I hand pollinate them. As you can see, I have been using the male zucchini flowers to pollinate the yellow squash female flowers and have ended up with some interestingly patterned squash! I especially like the circles! They taste like regular squash, only their appearance is affected. I might just let one cross-pollinated squash go to seed and plant the seeds next year just to see what it produces!