SainSmart MEGA Kit is designed for Atmega2560 microchip and came with, ATmega2560 microcontroller, SainSmart Sensor Shield V4 (the main board for the chip), SainSmart XBee Shield (unfortunatley no xbee module :( ) and SainSmart LCD Keypad Shield
All parts above can be interconected to create great electronic designs and are enough for every student project, hobby and more.
SainSmart MEGA 2560 Board for Arduino: This is a microcontroller board based on the ATmega2560. It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
The SainSmart Sensor Shield V4.0 for Arduino: It allows you to connect to various modules like sensors, servos, relays, buttons, potentiometers.
The SainSmart LCD Keypad Shield for Arduino: It includes a 16×2 HD44780 White on Blue LCD module and a 5 push button keypad for menu selection and user interface programming. Fully assembled. On-line Arduino tutorial and example code. Compatible with Arduino Uno, Mega, Duemilanove. Uses digital pins 4 – 10, and analog pin 0.
The SainSmartArduino XBee board for Arduino: It allows to wireless communicate over a modified ZigBee protocol using the popular XBee module from Maxstream.
More info and price here.