This achievement has been a little glitchy for some people including myself. I did the interior tutorial mission several times, tried to play offline and clear my save and never could get the achievement to pop. I finally got it to pop with the following steps.
1. Go offline
2. Delete your local Infinity save
3. Restart the game and play through the intro and the toy box tutorial until it gets to the INterior part with Cogsworth (Clock from Beauty and the Beast)
4. Go into your tree house and complete the following missions to customize your house
a. Personal Space
b. Room to Grow
C. Home Furnishings
D. You're Welcome
After you do these things then you will get a present and the achievement should pop, if it doesn't then exit back to the toy box and then back to the title screen.
5. Reconnect to the internet with your Xbox
6. From your Toy box menu load up Introduction to the Toy Box, Once I did this the achievement popped as soon as my toy box loaded.
7. Shut down the game and turn off your xbox. Then Power it up again and launch Infinity and when it tries to sync select the save from the cloud and you will have all of your progress back.
Hope this helps some of yall that are having problems with this achievement popping.