I understand your need to bathe your little people but I would not change a thing in this bathroom. What I would do is find a bathing station that could be placed in the shower temporarily until your little folks are no longer little, By the way, bath tubs regardless of the lovely ads that show sumptuous bathing areas as components of enormous and well appointed master bedrooms, are passe. A great idea 150 years ago and for the most part the only reasonable and effective solution. Today, bathing in most homes happens very infrequently and adding a tub to your space would be the tail wagging the dog. Keep the nice space you have created and add a temporary bathing solution. Best of luck with your project! If you enjoy any of my commentary please click on my Pro-Page link on the left and then click "follow". Regards. M

Third vote for getting a professional involved, but i'll still offer my layman's suggestion given that you're just soliciting general ideas at this point. If it was my space, I'd switch the bathroom and the laundry room around, keeping just one of the walls currently enclosing the toilet. Its hard to estimate precise measurements from the drawing, so it may not be feasible, but here's what i mean

always prefer separate toilet with handbasin, the bathroom has plenty of space for generous fixtures up to the sizes shown but the bathroom should be planned to suit potential users and relative to the whole plan (where are the windows?) next door rooms, orientation, outlook etc...this is one suggestion that has the best view on entering the room with the shower (tallest) at the side, bath with potential view, vanity with option for two basins and matching mirror doored wall cabinet and the toilet handbasin next to the shower keeps the plumbing sounds away from adjoining rooms more details may inspire other suggestions

Hi Cathrine, just a little sketch here for your tricky little bathroom. I was trying to get a bigger bath in, hide the toilet behind the door and have a vanity with lots of storage. What do you think? Let me know if you want to explode this any further. Thanks Gunnar