I need some help here. Our daughter was on the smaller side, so we kept her rear-facing until 5 years old! She is going to be 9 years old in a few weeks, and she is still in a 5-point harness high back car seat (forward facing). Her shoulders are now hitting the head protectors, and the straps are too low, so we want to move her to a backless booster, finally. She is about 48 lbs, so she weight-wise, the carseat still works. She has outgrown it. Obviously, we want to keep her safe. What are some recommended backless boosters for older children once they outgrow the high-backs?
Until the opening on 2 June 1996, of the first phase of the Belgian high speed line  , Eurostar trains were routed via the Belgian railway line 94 . After 2 June 1996, some Eurostars to Brussels were routed via the first phase of the Belgian High Speed line and the Belgian railway line 78 via Mons .  Journey times between London and Brussels were reduced by the full opening of HSL 1 on 14 December 1997.  Journey times between London and Brussels were improved when an 88-kilometre (55 mi) Belgian high-speed line, HSL 1 , opened on 14 December 1997.   It links with LGV Nord on the border with France, allowing Eurostar trains heading to Brussels to make the transition between the two without having to reduce speed. A further four-minute improvement for London–Brussels trains was achieved in December 2006 with the opening of the 435-metre (1,427 ft) Brussels South Viaduct .  Linking the international platforms of Brussels-South railway station with the high-speed line, the viaduct separates Eurostar (and Thalys) from local services.
Another addition to the all-in-one car seat category, the Safety 1st All-in-One takes you from newborn bucket seat to toddler (rear-racing to 40 pounds) to elementary school (front-facing to 50 pounds) and, finally, to a belt-positioning booster up to 100 pounds. It’s all the seat you’d ever need – or want, considering this baby has side-impact protection and meets or exceeds Federal and ASTM Safety Standards. Keep in mind its front-facing weight limit (50 pounds) is lower than its competitors (65-70 pounds) – but its price is, too.