  In this paper we describe a prototype of a blockchain-in-a-box system which
allows users to easily bootstrap the whole Ethereum Proof-of-Work (PoW) network
running on multiple Raspberry Pi nodes - an inexpensive modular computers.
Users are able to orchestrate the whole blockchain network using a single web
based interface, for example they are able to set the topology of the
peer-to-peer (P2P) connections and control the initialization parameters. Each
Raspberry Pi has a screen attached which visualizes current state of local
blockchain, allowing users to easily visualize the consensus of the network in
real time. We show how this platform can be used to perform experiments on
consensus quality while using different P2P topologies. Similar experiments can
be used for demonstration purposes in a workshop or other educational settings.
