Daniel, in that picture that you linked your post to, where doese it show his bed?
And when were those pictures taken? (what year?)
So what happend to all of those things that were in his room?
Going off topic here, but to answer your question about the things in the Tsarevich's bedroom at the Alexander Palace here is what I know:
As Bob Atchison wrote some years ago, the photos of the children’s appartments were taken «when the palace was a museum; during the brief years when the children's rooms were open to the public. »
He added :
« Immediately after the departure of the Romanovs for Siberia in August 1917 the palace was closed for a short (time) for inventory and then a series of rooms, mostly Parade Halls, were opened to the public. At first the upstairs rooms of the Imperial children were turned into an ill-fated children's home, but the lack of heating and the inappropriateness of having kids in a museum resulted in them moving elsewhere. This short-term use of the children's rooms caused a great deal of damage. It took a considerable amount of work by museum curators and restorers to recreate the rooms. Furniture that had been either stolen by communist party officials or transferred to other uses had to be located and hopefully returned. Most of the personal effects, pictures and such, had, fortunately, been placed in storage and were preserved. These items could easily be placed back in their original places through the recollections of servants and checking photographs. The rooms were then open to the public into the 1930's when they were ordered handed over to KGB officials as a kind of private weekend retreat for senior officals and the furnishings finally sold off. »
According to Suzanne Massey and Polovtsov (the Pavlovsk Palace curator she quotes in her book) Lunacharsky appropriated the Alexander Palace for himself and some friends (he apparently settled himself in rooms of the suite adjoining the former appartments of the children). He did want to turn the Palace into a boarding school for children, and proposed to distribute all the toys and books that were in the children’s appartments to schools and hospitals.
As Lukhomsky the Tsarskoe Selo Palaces Curator later recalled, on October 28, 1918 he received a letter from Lunacharsky, the new Bolshevik Commissar for Education (and Arts): «…it is unlikely that the objects that belonged to the last Romanovs will ever be of historical significance; therefore, you can hand over the furniture from the former heir’s appartments to the Children Homes’ Administration. »

Suzanne Massey adds that Lukhomsky managed to save the books of the Tsarevich marked with his personal ex libris but that the toys were all dispersed. She writes that « The appartments remained unoccupied – due to difficulty of heating and the fact that families did not willingly wish to give up their children ». So it is unclear to me if they ever were occupied or not. Judging by the photos and sketches done later, not all the toys were dispersed at the time and it seems to me the curators managed to save quite a lot of furniture, toys and other objects from the children rooms. Some things were also returned from Siberia after their death.
Alas, in the 1930s the upper floor was closed to the public and most of its content sold off. Fortunately, as explained in the « Nicholas and Alexandra At Home » exhibition catalogue, in 1932 the State Toy Museum – in Zagorsk - now Sergeev Posad again – received a number of toys, along with a few pieces of furniture, that used to be in the Alexander Palace collection. Some of these can be seen at the current exhibition. Hopefully, in the future, the Children’s rooms will be open as a museum again and what was saved will be transfered back to the Palace.