https://learnenglishkids.britishcouncil.org/en/grammar-games/going-plans
http://www.mes-games.com/future1.php
https://www.englishclub.com/esl-games/grammar/jumbled-future-going-to-1.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=5640
http://www.englishexercises.org/makeagame/viewgame.asp?id=2792
http://www.carmenlu.com/first/grammar/begoingto1_2.htm
http://www.englishgrammarsecrets.com/goingtofuture/exercise3.swf
For practicing questions
http://adelescorner.org/grammar/going_to/going_to_quests.html
http://saberingles.com.ar/curso/lesson11/07.html