We love that Bigtrak is back, we’ve been on about it for weeks, our disapppointment at the lack of trailer accessory  plain for all to read…Our discovery this afternoon of an iPhone app which appears on your handset as the control panel, operates as a calculator and makes all the appropriate Bigtrak sounds as you calculate has lifted our mood. We’ll just make our own trailer, fashion it from LEGO perhaps or borrow a Barbie car…We now wish we were in some sort of accountancy role and use our new found sum machine more often. Grab yours for FREE