EJSS primary school curriculum

thanks a primary school vice principal's request. This quick list is created.
can you think of a good simulation to make for primary science and mathematics? Google + request it below!

1. 
   

   

   http://weelookang.blogspot.sg/2015/06/ejss-moon-phases-model.html
   google awesome photo animation of sea level in a day
   

   click to run: EJSS Moon Phases Model

   offline: DOWNLOAD, UNZIP and CLICK *.html to run

   source: EJSS SOURCE CODES

   original author: Todd Timberlake, lookang

   author of EJSS version: lookang

2. 

   http://weelookang.blogspot.sg/2014/11/ejss-mass-scale-model.html

   1.00 kg scale showing reading of 0.80 kg

   image scale taken from http://www.abcteach.com/free/k/kilogramblankscalergb.jpg

   PLAY:  Link1 , Link2

   Download: Link1 , Link2

   source: Link1 , Link2

   author: lookang

   author of EJS 5: Paco.

3. 

   model X = t suggests you know how to use kinematics equation of  $ s = ut + \frac{1}{2}at^{2} $ where initial velocity u =1 and acceleration a = 0
   http://weelookang.blogspot.sg/2013/12/ejss-kinematics-model.html
   run: Link1, Link2
   download: Link1, Link2
   source: Link1, Link2
   

   EJSS Kinematics Model by lookang, based on models and ideas from Fu-Kwun, Andreu Glasmann, Wolfgang Christian, and Mario Belloni

   authors: lookang, Fu-Kwun, Andreu Glasmann, Wolfgang Christian, and Mario Belloni

   author EJS: Francisco Esquembre

4. 

   http://weelookang.blogspot.sg/2014/11/ejss-primary-school-pendulum-energy.html
   run: Link1, Link2
   download: Link1, Link2
   source: Link1, Link2
   author: Anne Cox, lookang
   author EJS: Francisco Esquembre

5. 

   http://weelookang.blogspot.sg/2014/05/ejss-object-on-plane-model-for-primary.html
   run: Link1, Link2
   download: Link1, Link2
   source: Link1, Link2
   author:Francisco Esquembre, lookang
   author EJS: Francisco Esquembre

6.