For viewing from inside, you could easily fill the space with tall potted plants( type depending where you live). If it's a place for her to play, I recently saw some really cute miniature "fairy garden" furniture at a local craft store. The fun of a fairy garden is what they can create from mostly natural materials, so collecting items for the houses on walks can be wonderful. Painted rocks, homemade wind chimes, twig furniture, etc. are a great way to incorporate her creativity. I have a 13-yr.-old, so I sometimes miss those projects. :)

There's a lot of technical codes but if you scroll to the bottom there are Dulux suggestions.

There is excellent advice for care of your grass trees if you google 'Bruinsma grass trees' ... shows how to care for them especially in the first 12 months, there advice is invaluable as they specialise in grass trees, they advise regular deep watering until established, I would follow their advice if you want your grass tree to have the best chance of survival as they are an investment in both money and a statement for your garden.

Cut some of the really leggy branches off (approx 300mm from the next branch), dry them out for a couple of days then pot them in some free draining soil. Triple your plants for the price of one. Where you cut them off will then sprout, maybe even two or three epicormic buds will sprout to fill the plant out beautifully. Re-pot the existing plant as soon as possible, refreshing the potting mix completely, because it is just about to go into its growing phase as it warms up.